Thomas g



(No Model.)

T. G. OTTERSON 8v 0. O. VOORHIES.

GLASS GAN GAP.

Pathted Mar; 3, 1885.

/ IVESSES UNTTED STATES aTaNT THOMAS G. OTTERSON AND CORNELIUS C. VOORHIES, OF \VOODBURY, N. J.

GLASS CAN-CAP.

SPECIFICATION forming part of Letters Patent No, 313,229, dated March 3, 1885.

Application filed December 29, 1884.

(No model.)

, and CORNELIUS O. VooRHIEs, of Woodbury,

in the county of Gloucester and State of New Jersey, have invented certain new and useful Improvements in Glass Can-Caps; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to an improvement in can-caps.

To render a glass can-cap secure against breaking by internal pressure, it is necessary that there should be some means of outlet for the internal gases, particularly steam, and it is further desirable that the outlet should be of such construction as to form a stop against the inlet of air. The above ends have hitherto been attained with a greater or less degree ofsuccess by means of a yielding cover,which allows the compressed gases to escape past the elastic gasket interposed between the cover and jar, or by means of valves formed in the covers. These means are in some respects objectionable, the latter because the valves are exposed or subject to accidentaldisplacement, and the former because in the most approved construction of the clamp or yoke style of jar the caps are liable to be secured too rigidly to the jar to admit of the escape of gases by the gasket.

The object of our present invention is to provide means for the escape of the compressed gases, particularly steam formed in boiling the fruit, which shall be free from the obj ectionable features of those heretofore provided, and which shall be particularly adapted to use in connection with a clamp secured on a central stud.

\Vith these ends in view our. invention consists in certain features of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical section of a can-cap embodying our invention; and Fig. 2 is a plan View with studcap, cushion, and valve removed.

A represents a glass lid or cap, showing a depressed annular portion, a, and an upward ly-extending central stud, B. The stud Bis threaded, and a metallic cap, 0, is provided with an internal thread, 0, adapted to screw on the stud B. A yoke, D, adapted to take under oblique ribs on the neck of the jar,'is provided with a central perforation, d, which receives the stud B, and said yoke is secured on the stud by the cap 0. The construction of the lid, stud, yoke, and jar as thus far described is quite similar to that shown and described in Letters Patent No. 308,571, granted to Thomas G. and John H. Otterson, November 25, 1884..

Our present improvement consists in providing the stud B with a perforation, b, and covering said perforation with a valve, E, adapted to lift and allow the escape of gas from the jar,and.automatically close and prevent the ingress of air when the cagQisnot, on thestud. \Ve also provide the top of the iiisid ofthe cap (-1 with a circular piece of rubber, e, or equivalent elastic material, adapted to rest in contact with the valve on the top of the stud and hold it down when the cap is on the stud. The valve E may be constructed in a variety of forms; but we prefer to employ a disk of rubber or other flexible material sufficiently small to rest within the cap and completely close the opening in the stud.

The operation of the valve in practice is as follows: Thejar is filled wit-h the fruit to be preserved, the lid is laid on, and the yoke placed on the stud and turned to draw thelid snugly down on the jar. The st ud gap is lefaoff or loosened sufficiently tdp'ermit the steam to escEpeT'The jar is then placed in water and the fruit boiled. The steam escapes through the perforation in thestud, and when the fruit is sufficiently cooked and the jar set aside to cool the valve permits the steam to escape from the jar and prevents the ingress of air. After the jar and contents are sufficiently cooled the cap is screwed on the stud and protects the valve against accidental displacement, and at the same time holds the yoke on the stud when the lid is removed to take out the fruit.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a lid or cover for jars, having an externally screw-threaded stud, the latter being provided with a longitudinal perforation, of a valve resting on and closing the perforation in said stud, and a screwthreaded cap for holding the valve in place, substantially as set forth.

2. The combination, with the perforated stud and a yoke pivoted thereon, of a valve 5 closing the perforation in the stud, and a cap fitting on the stud and performing the double function of protecting the valve and securing the yoke, substantially as set forth.

3. The combination, with a lid or cover for 10 jars,having an externally screw-threaded stud,

the latter being provided with a longitudinal perforation, of a valve resting on and closing the perforation in said stud, a screw-threaded cap, and a cushion located within the cap and I 5 resting on the valve, substantially as set forth. 4. The combination, with the lid provided THOMAS G. OTTERSON. CORNELIUS C. VOORHIES.

\Vi-tn esses:

S. PAUL LOUDENSLAGER, H. C. LOUDENSLAGER. 

